21491384

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{271}}^1\times {\mathrm{431}}^1$

素因数の和:731

約数の個数: 32

約数和(自身を含む): 42301440

約数和(自身を除く): 20810056

約数列:

[1, 2, 4, 8, 23, 46, 92, 184, 271, 431, 542, 862, 1084, 1724, 2168, 3448, 6233, 9913, 12466, 19826, 24932, 39652, 49864, 79304, 116801, 233602, 467204, 934408, 2686423, 5372846, 10745692, 21491384]

約数ペア:

[(1, 21491384), (2, 10745692), (4, 5372846), (8, 2686423), (23, 934408), (46, 467204), (92, 233602), (184, 116801), (271, 79304), (431, 49864), (542, 39652), (862, 24932), (1084, 19826), (1724, 12466), (2168, 9913), (3448, 6233)]